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by npn 32 days ago
Rar is proprietary. Good luck.
2 comments

Clean room is a thing.

First use some model to make a specification. Then another to implement it from the specification.

https://law.stackexchange.com/a/83552

I suppose the question is whether the author had ever entered into a contract limiting reverse engineering...

If they read the source code of unrar, or in this case, using genai (which obviously included unrar source code in its training set) then yes. You can check the agreement for unrar source code release.